| 摘要 |
PROBLEM TO BE SOLVED: To remove member's favorite songs from a song list which is recommended for a next request song. SOLUTION: A user-classified favorite song list in which a user ID of a user who logs in is related to a song ID set is stored in a storage means. Before a recommendation song list is displayed, a song ID set (A) of all songs of the recommendation song list is compared with a union set (B) of song ID sets of the favorite song list of all log-in users, which are stored in the storage means. Then, a difference set in which the union set (B) is removed from the song ID set (A) is calculated, and songs of the calculated song ID set are displayed as the recommendation list in a Karaoke device. COPYRIGHT: (C)2010,JPO&INPIT
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